<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>{% block title %}ten{% endblock %}</title>
</head>
<body>
{% block head %}
  <h3>This is the head</h3>
{% endblock %}
{% block content %}
  <h3>This is the Content</h3>
{% endblock %}
{% block foot %}
  <h3>This is the Foot</h3>
{% endblock %}
</body>
</html>